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<title>步骤3：创建备份SLA</title>
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<h1 class="topictitle1">步骤3：创建备份SLA</h1>
<div id="body0000001188956464"><p id="ZH-CN_TOPIC_0000001188956464__p1232219182511">您需要创建备份SLA，对文件系统执行备份。</p>
<div class="section" id="ZH-CN_TOPIC_0000001188956464__section8564386224"><h4 class="sectiontitle">注意事项</h4><ul id="ZH-CN_TOPIC_0000001188956464__ul8881201542213"><li id="ZH-CN_TOPIC_0000001188956464__li0881181562219">不支持备份失效的软链接文件。</li><li id="ZH-CN_TOPIC_0000001188956464__li187993414419">不支持管道、套接字等非普通文件类型的文件备份。</li><li id="ZH-CN_TOPIC_0000001188956464__li0352239204413">异步复制从端备份窗口需要尽量和复制窗口错开，如果是以复制等待的方式配置的策略，则复制完成等待时间需要大于3分钟。</li><li id="ZH-CN_TOPIC_0000001188956464__li1810135564415">名称以<span class="uicontrol" id="ZH-CN_TOPIC_0000001188956464__uicontrol17772104184517">“pvc_”</span>开头的文件系统不支持备份。</li><li id="ZH-CN_TOPIC_0000001188956464__li12365922102314">同步复制从端不允许添加保护。</li><li id="ZH-CN_TOPIC_0000001188956464__li122562029132317">WORM/CLONE/非UNIX安全模式文件系统不支持备份。</li><li id="ZH-CN_TOPIC_0000001188956464__li13690759202313">双活脑裂后，仲裁失败端不支持备份恢复。</li><li id="ZH-CN_TOPIC_0000001188956464__li176861516245">只支持系统默认租户System_vStore文件系统备份。</li><li id="ZH-CN_TOPIC_0000001188956464__li127302702414">只支持通过NFS进行备份，不支持CIFS。</li></ul>
</div>
<div class="section" id="ZH-CN_TOPIC_0000001188956464__section98912026153513"><h4 class="sectiontitle">操作步骤</h4><ol id="ZH-CN_TOPIC_0000001188956464__ol0598140123514"><li id="ZH-CN_TOPIC_0000001188956464__li149381918143112"><span>选择<span class="menucascade" id="ZH-CN_TOPIC_0000001188956464__menucascade15901336135014">“<span class="uicontrol" id="ZH-CN_TOPIC_0000001188956464__uicontrol159011136155018"><span id="ZH-CN_TOPIC_0000001188956464__text23759296521">保护</span></span> &gt; <span class="uicontrol" id="ZH-CN_TOPIC_0000001188956464__uicontrol1560403885017"><span id="ZH-CN_TOPIC_0000001188956464__text9687134795217">保护策略</span></span> &gt; <span class="uicontrol" id="ZH-CN_TOPIC_0000001188956464__uicontrol15064355013"><span id="ZH-CN_TOPIC_0000001188956464__text14767205735211">SLA</span></span>”</span>。</span></li><li id="ZH-CN_TOPIC_0000001188956464__li85725345317"><span>单击<span class="uicontrol" id="ZH-CN_TOPIC_0000001188956464__zh-cn_topic_0000001142022930_uicontrol12389192016473">“<span id="ZH-CN_TOPIC_0000001188956464__zh-cn_topic_0000001142022930_text1214017349462">创建</span>”</span>。</span></li><li id="ZH-CN_TOPIC_0000001188956464__li632243103212"><span>自定义SLA的名称。</span></li><li id="ZH-CN_TOPIC_0000001188956464__li1859517202518"><span>选择需要创建SLA的应用类型。</span><p><ol type="a" id="ZH-CN_TOPIC_0000001188956464__ol71011061385"><li id="ZH-CN_TOPIC_0000001188956464__li874192611325">单击<span class="uicontrol" id="ZH-CN_TOPIC_0000001188956464__uicontrol16364345183319">“<span id="ZH-CN_TOPIC_0000001188956464__text1149753619468">应用</span>”</span>图标，在弹出的窗口中选择<span class="uicontrol" id="ZH-CN_TOPIC_0000001188956464__uicontrol17903536763">“<span id="ZH-CN_TOPIC_0000001188956464__text6588105302917">本地文件系统</span>”</span>。</li><li id="ZH-CN_TOPIC_0000001188956464__li7586156123316">单击<span class="uicontrol" id="ZH-CN_TOPIC_0000001188956464__uicontrol206968467360">“<span id="ZH-CN_TOPIC_0000001188956464__text10286184013314">确定</span>”</span>。</li></ol>
</p></li><li id="ZH-CN_TOPIC_0000001188956464__li167542484582"><span>单击<span class="uicontrol" id="ZH-CN_TOPIC_0000001188956464__uicontrol18235203385915">“<span id="ZH-CN_TOPIC_0000001188956464__text3235143318594"><span id="ZH-CN_TOPIC_0000001188956464__text10275546133113">备份策略</span></span>”</span>图标。</span></li><li id="ZH-CN_TOPIC_0000001188956464__li148724933815"><span>配置备份策略基础参数。</span><p><ol type="a" id="ZH-CN_TOPIC_0000001188956464__ol2914153515019"><li id="ZH-CN_TOPIC_0000001188956464__li1891263519011">在<span class="uicontrol" id="ZH-CN_TOPIC_0000001188956464__uicontrol14912173514011">“<span id="ZH-CN_TOPIC_0000001188956464__text0220111193013">备份存储</span>”</span>右侧下拉框中选择<a href="zh-cn_topic_0000001188939346.html">3.1.1</a>中创建的备份存储。</li><li id="ZH-CN_TOPIC_0000001188956464__li3914035502">设置增量备份参数。支持周期性备份和指定时间备份两种方式。<p id="ZH-CN_TOPIC_0000001188956464__p18912123515014"><a name="ZH-CN_TOPIC_0000001188956464__li3914035502"></a><a name="li3914035502"></a>相关参数说明如<a href="#ZH-CN_TOPIC_0000001188956464__table1591417351806">表1</a>所示。</p>
<div class="p" id="ZH-CN_TOPIC_0000001188956464__p1191213351402">请根据业务情况合理设置备份频率、副本保留时长和备份时间窗口，建议如下：<ul id="ZH-CN_TOPIC_0000001188956464__ul169120351012"><li id="ZH-CN_TOPIC_0000001188956464__li2091819292110">如果系统中待保护的文件系统是远程复制的从端，应尽量将系统的备份时间窗口和远程复制的复制时间窗口错开。否则可能会造成备份任务失败。</li><li id="ZH-CN_TOPIC_0000001188956464__li29127354019">备份频率至少大于备份时长。</li><li id="ZH-CN_TOPIC_0000001188956464__li139122353016">首次执行备份时间建议与时间窗口的开始时间一致。</li><li id="ZH-CN_TOPIC_0000001188956464__li129129359010">副本保留时长必须大于备份频率。</li></ul>
</div>

<div class="tablenoborder"><a name="ZH-CN_TOPIC_0000001188956464__table1591417351806"></a><a name="table1591417351806"></a><table cellpadding="4" cellspacing="0" summary="" id="ZH-CN_TOPIC_0000001188956464__table1591417351806" frame="border" border="1" rules="all"><caption><b>表1 </b>备份策略基础参数场景说明</caption><colgroup><col style="width:10.83%"><col style="width:13.889999999999999%"><col style="width:75.28%"></colgroup><thead align="left"><tr id="ZH-CN_TOPIC_0000001188956464__row391217351202"><th align="left" class="cellrowborder" colspan="2" valign="top" id="mcps1.3.3.2.6.2.1.2.3.2.4.1.1"><p id="ZH-CN_TOPIC_0000001188956464__p591273518016">参数</p>
</th>
<th align="left" class="cellrowborder" valign="top" id="mcps1.3.3.2.6.2.1.2.3.2.4.1.2"><p id="ZH-CN_TOPIC_0000001188956464__p2912103510019">说明</p>
</th>
</tr>
</thead>
<tbody><tr id="ZH-CN_TOPIC_0000001188956464__row19132351607"><td class="cellrowborder" colspan="2" valign="top" headers="mcps1.3.3.2.6.2.1.2.3.2.4.1.1 "><p id="ZH-CN_TOPIC_0000001188956464__p1791310351307">名称</p>
</td>
<td class="cellrowborder" valign="top" headers="mcps1.3.3.2.6.2.1.2.3.2.4.1.2 "><p id="ZH-CN_TOPIC_0000001188956464__p15835182717387">设置备份策略名称。</p>
</td>
</tr>
<tr id="ZH-CN_TOPIC_0000001188956464__row10172155863813"><td class="cellrowborder" colspan="2" valign="top" headers="mcps1.3.3.2.6.2.1.2.3.2.4.1.1 "><p id="ZH-CN_TOPIC_0000001188956464__p1236218263914">-</p>
</td>
<td class="cellrowborder" valign="top" headers="mcps1.3.3.2.6.2.1.2.3.2.4.1.2 "><div class="p" id="ZH-CN_TOPIC_0000001188956464__p157911675147">配置增量备份的首次执行时间、备份频率、副本保留时长以及备份时间窗口。<ul id="ZH-CN_TOPIC_0000001188956464__zh-cn_topic_0000001506280289_ul167919791414"><li id="ZH-CN_TOPIC_0000001188956464__zh-cn_topic_0000001506280289_li1079119781413">配置增量备份的备份频率以及副本的保留时长。<ul id="ZH-CN_TOPIC_0000001188956464__zh-cn_topic_0000001506280289_ul1679113751412"><li id="ZH-CN_TOPIC_0000001188956464__zh-cn_topic_0000001506280289_li177910751413"><span id="ZH-CN_TOPIC_0000001188956464__zh-cn_topic_0000001506280289_text9791187121410">按年</span><p id="ZH-CN_TOPIC_0000001188956464__zh-cn_topic_0000001506280289_p7791117131413">设置每年xx月xx日执行一次，副本保留xx天/周/月/年或永久保留。</p>
<p id="ZH-CN_TOPIC_0000001188956464__zh-cn_topic_0000001506280289_p62586191379">如果当年不存在该日期，则不产生副本。</p>
</li><li id="ZH-CN_TOPIC_0000001188956464__zh-cn_topic_0000001506280289_li1279112715144"><span id="ZH-CN_TOPIC_0000001188956464__zh-cn_topic_0000001506280289_text979110717147">按月</span><p id="ZH-CN_TOPIC_0000001188956464__zh-cn_topic_0000001506280289_p179113721413">设置每月xx日（可选择多日）或最后一天执行一次，副本保留xx天/周/月/年或永久保留。</p>
<p id="ZH-CN_TOPIC_0000001188956464__zh-cn_topic_0000001506280289_p125877114419">如果设置为每月xx日执行一次备份，当月不存在该日期时，则不产生副本。</p>
</li><li id="ZH-CN_TOPIC_0000001188956464__zh-cn_topic_0000001506280289_li879112716144"><span id="ZH-CN_TOPIC_0000001188956464__zh-cn_topic_0000001506280289_text27913720144">按周</span><p id="ZH-CN_TOPIC_0000001188956464__zh-cn_topic_0000001506280289_p1079111741416">设置每周一/二/三/四/五/六/日执行一次（可多选），副本保留xx天/周/月/年或永久保留。</p>
</li><li id="ZH-CN_TOPIC_0000001188956464__zh-cn_topic_0000001506280289_li251355615915"><span id="ZH-CN_TOPIC_0000001188956464__zh-cn_topic_0000001506280289_text1391110711343">按天</span><p id="ZH-CN_TOPIC_0000001188956464__zh-cn_topic_0000001506280289_p175137561491">设置从xx年xx月xx日开始，每xx天执行一次备份，副本保留xx天/周/月/年或永久保留。</p>
</li><li id="ZH-CN_TOPIC_0000001188956464__zh-cn_topic_0000001506280289_li17513125616918"><span id="ZH-CN_TOPIC_0000001188956464__zh-cn_topic_0000001506280289_text11653155316339">按小时</span><p id="ZH-CN_TOPIC_0000001188956464__zh-cn_topic_0000001506280289_p451312561795">设置从xx年xx月xx日开始，每xx小时执行一次备份，副本保留xx天/周/月/年或永久保留。</p>
</li><li id="ZH-CN_TOPIC_0000001188956464__zh-cn_topic_0000001506280289_li108498361016"><span id="ZH-CN_TOPIC_0000001188956464__zh-cn_topic_0000001506280289_text4119140183416">按分钟</span><p id="ZH-CN_TOPIC_0000001188956464__zh-cn_topic_0000001506280289_p178491339103">设置从xx年xx月xx日开始，每xx分钟执行一次备份，副本保留xx天/周/月/年或永久保留。</p>
</li></ul>
</li><li id="ZH-CN_TOPIC_0000001188956464__zh-cn_topic_0000001506280289_li1679107171411">设置允许执行增量备份的时间段，该时间范围以外的时间不会进行增量备份任务调度。<div class="note" id="ZH-CN_TOPIC_0000001188956464__zh-cn_topic_0000001506280289_note77917711419"><span class="notetitle"> 说明： </span><div class="notebody"><ul id="ZH-CN_TOPIC_0000001188956464__zh-cn_topic_0000001506280289_zh-cn_topic_0000001506280289_ul64461851101420"><li id="ZH-CN_TOPIC_0000001188956464__zh-cn_topic_0000001506280289_zh-cn_topic_0000001506280289_li037445621410">如果结束时间小于或等于开始时间，则结束时间实际为跨日的结束时间。</li><li id="ZH-CN_TOPIC_0000001188956464__zh-cn_topic_0000001506280289_zh-cn_topic_0000001506280289_li4446145117142">如果备份任务在指定的时间窗口内未执行完成，系统不会中止本次备份任务，但会上报告警。</li><li id="ZH-CN_TOPIC_0000001188956464__zh-cn_topic_0000001506280289_zh-cn_topic_0000001506280289_li4684315367">一旦副本超过设定的保留时长，系统将自动删除过期的副本。</li></ul>
</div></div>
</li></ul>
</div>
</td>
</tr>
</tbody>
</table>
</div>
</li><li id="ZH-CN_TOPIC_0000001188956464__li10746858142810">如需新增增量备份计划，请单击右侧的<span class="uicontrol" id="ZH-CN_TOPIC_0000001188956464__uicontrol2313145215292">“<span id="ZH-CN_TOPIC_0000001188956464__text176532055135116">添加策略</span>”</span>。<div class="note" id="ZH-CN_TOPIC_0000001188956464__note132691334135318"><img src="public_sys-resources/note_3.0-zh-cn.png"><span class="notetitle"> </span><div class="notebody"><p id="ZH-CN_TOPIC_0000001188956464__p526963419537">每个备份存储只支持关联一个备份策略。</p>
</div></div>
</li></ol>
</p></li><li id="ZH-CN_TOPIC_0000001188956464__li17967833631"><span>配置备份策略高级参数。</span><p><div class="p" id="ZH-CN_TOPIC_0000001188956464__p1915143519019">相关参数说明如<a href="#ZH-CN_TOPIC_0000001188956464__table79151351804">表2</a>所示。
<div class="tablenoborder"><a name="ZH-CN_TOPIC_0000001188956464__table79151351804"></a><a name="table79151351804"></a><table cellpadding="4" cellspacing="0" summary="" id="ZH-CN_TOPIC_0000001188956464__table79151351804" frame="border" border="1" rules="all"><caption><b>表2 </b>备份策略高级参数说明</caption><colgroup><col style="width:30.06%"><col style="width:69.94%"></colgroup><thead align="left"><tr id="ZH-CN_TOPIC_0000001188956464__row791411353020"><th align="left" class="cellrowborder" valign="top" width="30.06%" id="mcps1.3.3.2.7.2.1.2.2.3.1.1"><p id="ZH-CN_TOPIC_0000001188956464__p1291453517013">参数</p>
</th>
<th align="left" class="cellrowborder" valign="top" width="69.94%" id="mcps1.3.3.2.7.2.1.2.2.3.1.2"><p id="ZH-CN_TOPIC_0000001188956464__p491413351904">说明</p>
</th>
</tr>
</thead>
<tbody><tr id="ZH-CN_TOPIC_0000001188956464__row291417351304"><td class="cellrowborder" valign="top" width="30.06%" headers="mcps1.3.3.2.7.2.1.2.2.3.1.1 "><p id="ZH-CN_TOPIC_0000001188956464__p189144351802"><span id="ZH-CN_TOPIC_0000001188956464__text2091453512010">限速策略</span></p>
</td>
<td class="cellrowborder" valign="top" width="69.94%" headers="mcps1.3.3.2.7.2.1.2.2.3.1.2 "><p id="ZH-CN_TOPIC_0000001188956464__p9914193512019">备份任务平均每秒最大传输的数据量。</p>
<p id="ZH-CN_TOPIC_0000001188956464__p291493514017">选择<a href="zh-cn_topic_0000001633399125.html">步骤2：创建限速策略</a>中已创建的限速策略。</p>
</td>
</tr>
<tr id="ZH-CN_TOPIC_0000001188956464__row19141935908"><td class="cellrowborder" valign="top" width="30.06%" headers="mcps1.3.3.2.7.2.1.2.2.3.1.1 "><p id="ZH-CN_TOPIC_0000001188956464__p10914183512011"><span id="ZH-CN_TOPIC_0000001188956464__text1698545110322">自动索引</span></p>
</td>
<td class="cellrowborder" valign="top" width="69.94%" headers="mcps1.3.3.2.7.2.1.2.2.3.1.2 "><p id="ZH-CN_TOPIC_0000001188956464__p5914935506">是否开启自动索引。开启后系统自动对副本中的文件或目录建立索引，并对文件或目录执行文件级恢复及下载操作。</p>
</td>
</tr>
<tr id="ZH-CN_TOPIC_0000001188956464__row39159351602"><td class="cellrowborder" valign="top" width="30.06%" headers="mcps1.3.3.2.7.2.1.2.2.3.1.1 "><p id="ZH-CN_TOPIC_0000001188956464__p18914123514020"><span id="ZH-CN_TOPIC_0000001188956464__text1988495714325">聚合</span></p>
</td>
<td class="cellrowborder" valign="top" width="69.94%" headers="mcps1.3.3.2.7.2.1.2.2.3.1.2 "><p id="ZH-CN_TOPIC_0000001188956464__p149149351209">是否将多个小文件聚合成大文件，提升备份速率。</p>
</td>
</tr>
<tr id="ZH-CN_TOPIC_0000001188956464__row20915135409"><td class="cellrowborder" valign="top" width="30.06%" headers="mcps1.3.3.2.7.2.1.2.2.3.1.1 "><p id="ZH-CN_TOPIC_0000001188956464__p17915635507"><span id="ZH-CN_TOPIC_0000001188956464__text716013393315">网络加速</span></p>
</td>
<td class="cellrowborder" valign="top" width="69.94%" headers="mcps1.3.3.2.7.2.1.2.2.3.1.2 "><p id="ZH-CN_TOPIC_0000001188956464__zh-cn_topic_0164720430_zh-cn_topic_0145458805_zh-cn_topic_0138136329_p476014816598">是否启用网络加速。开启后可使用BBR（Bottleneck Bandwidth and Round-trip propagation time）网络加速，网络时延≥20毫秒时建议启用该选项。</p>
<div class="note" id="ZH-CN_TOPIC_0000001188956464__zh-cn_topic_0164720430_zh-cn_topic_0145458805_zh-cn_topic_0138136329_note43921928185510"><span class="notetitle"> 说明： </span><div class="notebody"><p id="ZH-CN_TOPIC_0000001188956464__p10712821154012">对于同一个对象存储的不同桶，建议配置相同的<span class="wintitle" id="ZH-CN_TOPIC_0000001188956464__zh-cn_topic_0164720430_zh-cn_topic_0145458805_zh-cn_topic_0138136329_wintitle17893135418494">“网络加速”</span>选项（即要么全部启用，要么全部不启用）。</p>
</div></div>
</td>
</tr>
<tr id="ZH-CN_TOPIC_0000001188956464__row691510358017"><td class="cellrowborder" valign="top" width="30.06%" headers="mcps1.3.3.2.7.2.1.2.2.3.1.1 "><p id="ZH-CN_TOPIC_0000001188956464__p8915535609"><span id="ZH-CN_TOPIC_0000001188956464__text9915735708">失败后自动重试</span></p>
</td>
<td class="cellrowborder" valign="top" width="69.94%" headers="mcps1.3.3.2.7.2.1.2.2.3.1.2 "><p id="ZH-CN_TOPIC_0000001188956464__p59151935109">开启后，备份任务失败后系统自动重试。</p>
<div class="p" id="ZH-CN_TOPIC_0000001188956464__p159158351007">支持重试次数为1~5次，等待时长为1~30分钟。如设置为重试3次，等待5分钟，即每5分钟后重试一次，总共重试3次。<div class="note" id="ZH-CN_TOPIC_0000001188956464__note1191518351206"><span class="notetitle"> 说明： </span><div class="notebody"><p id="ZH-CN_TOPIC_0000001188956464__p49151035302">自动重试时系统会创建一个新的备份任务，如果该备份任务不在设定的时间窗内则不会执行，此次备份失败。</p>
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<tr id="ZH-CN_TOPIC_0000001188956464__row1491515351800"><td class="cellrowborder" valign="top" width="30.06%" headers="mcps1.3.3.2.7.2.1.2.2.3.1.1 "><p id="ZH-CN_TOPIC_0000001188956464__p19154351907"><span id="ZH-CN_TOPIC_0000001188956464__text8436134317308">合成全量周期</span></p>
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<td class="cellrowborder" valign="top" width="69.94%" headers="mcps1.3.3.2.7.2.1.2.2.3.1.2 "><p id="ZH-CN_TOPIC_0000001188956464__p199151035903">选择每备份多少次后进行一次全量备份。例如，开启<span id="ZH-CN_TOPIC_0000001188956464__text7460103117541">合成全量周期</span>，选择<span id="ZH-CN_TOPIC_0000001188956464__text1149754165420">备份</span>5次，那么在执行第6次备份时，系统将做全量备份。</p>
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</p></li><li id="ZH-CN_TOPIC_0000001188956464__li1618195321716"><span>单击<span class="uicontrol" id="ZH-CN_TOPIC_0000001188956464__uicontrol65831059121713">“<span id="ZH-CN_TOPIC_0000001188956464__text1833112168332">确定</span>”</span>，系统返回创建SLA页面。</span></li><li id="ZH-CN_TOPIC_0000001188956464__li1092814385513"><span>单击<span class="uicontrol" id="ZH-CN_TOPIC_0000001188956464__uicontrol29131271161">“<span id="ZH-CN_TOPIC_0000001188956464__text12104162233310">确定</span>”</span>，完成SLA创建。</span></li></ol>
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<div class="parentlink"><strong>父主题：</strong> <a href="zh-cn_topic_0000001189115024.html">备份</a></div>
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